The coordination numbers of Co and Al in [Co( | vedclass

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(D) The coordination number is defined as the number of ligand donor atoms to which the metal is directly bonded.$en$ (ethane$-1,2-$diamine) is a bide

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$5$ and $6$

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(D) The coordination number is defined as the number of ligand donor atoms to which the metal is directly bonded.$en$ (ethane$-1,2-$diamine) is a bidentate ligand,meaning it occupies $2$ coordination sites.In $[Co(Cl)(en)_2]Cl$,the coordination number of $Co$ is $1(Cl) + 2(2 	imes en) = 5$.$C_2O_4^{2-}$ (oxalate) is also a bidentate ligand.In $K_3[Al(C_2O_4)_3]$,the coordination number of $Al$ is $3(C_2O_4) 	imes 2 = 6$.Therefore,the coordination numbers are $5$ and $6$.

The coordination numbers of $Co$ and $Al$ in $[Co(Cl)(en)_2]Cl$ and $K_3[Al(C_2O_4)_3]$,respectively,are ($en =$ ethane$-1,2-$diamine).

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